[Dataguard]主庫歸檔丟失，備庫不需重建實驗

1）模擬環境，修改主庫參數，延遲歸檔傳輸到備庫 SQL> alter system set log_archive_dest_state_2=defer; System altered. 2）在主庫進行一些DML操做 SQL> create table neal as select * from dba_objects; Table created. SQL> delete from nea

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